#include <stdio.h>

union test{
    int n;
    char c;
};


int main(void){

    union test my;
    my.n=0x12345678;
    printf("%x\n",my.c);
    if(my.c == 0x78){
        printf("小\n");
    }else{
        printf("大\n");
    }

    return 0;
}